HCFA TX2N-4AD-PT User Manual

1
-4AD-PT User's Manual
2N
This manual contains texts, diagrams and explanations which will guide the reader in the
correct installation and operation of TX2N-4AD-PT. This manual should be read and
understood carefully before attempting to install or use the unit.
1. Introduction
• The TX2N-4AD-PT analog block amplifies the input from four platinum temperature
sensors (Pt 100, 3 wire, 100 Ω) and converts the data into 12 bit reading's stored in the
main unit. Both Centigrade (°C) and Fahrenheit (°F) can be read. Reading resolution is 0.2°C
to 0.3°C / 0.36°F to 0.54°F.
• The TX2N-4AD-PT can connected to the LX1N/HCA2/HCA5/TX3U/HCA8/HCA8C series
Programmable Controllers (PLC).
• All data transfers and parameter setups are adjusted via software control of the TX2N-
4AD-PT; by use of the TO/FROM applied instructions in the PLC.
• The TX2N-4AD-PT occupies 8 I/O points on the PLC expansion bus. The 8 I/O points can
be allocated from either inputs or outputs. The TX2N-4AD-PT draws 30mA from the 5V rail
of the main unit or powered extension unit.

2. External dimensions

Weight: Approx. 0.3 kg (0.66 lbs) Dimensions: mm (inches)
TX2N-4AD-PT

3. Connection with PLC

3.1 Connection with PLC

The TX2N-4AD-PT unit can be connected to the PLCs as follows. Restrictions apply to the
maximum number of connectable units, depending on the DC24V/DC5V Power Supply
capacities and the Main Unit/ Special Function Unit types. For details, refer to the respective
PLC manual.
HCA5/HCA8/TX3U : The maximum connectable units is 8.
HCA8C*1 : The maximum connectable units is 8.
To connect the TX2N-4AD-PT with the HCA8C main unit, HCA8C-CNV5V
-TX2N is required.
LX1N/HCA2 : The maximum connectable units is 8.
*1 Up to 7 units can be connected to an HCA8C-16X16YT PLC.
TX2N-4AD-PT User's Manual 2

3.2 Special function block numbers

Other special units of blocks that use FROM/TO instructions, such as analog input blocks,
analog output blocks and high-speed counter blocks, can be directly connected to the main
unit of the PLC or to the right side of other extension blocks or units.

4.1 Wiring

4.2 Using crimp terminations

5.1 General specification

Item
General specifications
Dielectric withstand voltage

5.2 Power supply specification

Item
Analog circuits
Digital circuits
TX2N-4AD-PT User's Manual
TX2N-32ER
X050-X067
Y030-Y047

4. Wiring

①
The cable of the Pt 100 sensor or a twisted shielded
cable should be used for the analog input cable. This
analog input cable should be wired separately from
power lines or any other lines which may induce noise.
The three wire method improves the accuracy of the
sensors by compensating voltage drops.
②
If there is electrical noise, connect the FG (frame
ground) terminal with the ground terminal. (In CH1,
there is no FG terminal. Use FG terminal of other
channels.
③
Connect the ground terminal on the TX2N-4AD-PT
unit with the grounded terminal on the main unit. Use
grounding on the main unit, if grounding is possible.
④ Either an external or the 24V built-in supply in the PLC
TX2N-4AD-PT
may be used.
For additional data regarding EMC considerations
please see section 10.
Use crimp terminals as indicated on the left.
Secure the terminal using a tightening torque of
between 0.5 and 0.8N·m.
Wire only to the module terminals discussed in this
manual. Leave all others vacant.

5. Installation notes and usage

Specification
Same as those for the main unit
500V AC, 1min (between all terminals and ground)
Specification
24V DC ± 10%, 50mA
5V DC, 30mA (internal power supply from the main unit)
3

5.3 Performance specification

Analog Inputs
Centigrade
Item
Both °C and °F are available by reading the appropriate buffer memory (BFM).
Analog input
Platinum Temperature Pt 100 sensors (100 Ω), 3-wire, 4-channel
signal
(CH1, CH2, CH3, CH4), (DIN 43760, JIS C 1604-1997, JIS C 1604-1981)
Current to sensor 1 mA. sensor: 100 ΩPt 100
Compensated
TX2N-4DA-PT
-100°C to +600°C
range
-1000 to 6000
Digital output
12-bit conversion 11 data bits +1 sign bit 16-bit binary with sign
TX2N-4AD-PT
Minimum
Special block 0.2°C to 0.3°C
resolvable temp.
No.2
± 1% full scale (compensated range)
Overall accuracy
See section 7.0 for special EMC considerations
Conversion speed 60ms (15 ms for 4 channels)
Analog Inputs continued...
+6,000
Conversion
Characteristics
-100℃
-1,000
Temp.input
Miscellaneous
Item
Photo-coupler isolation between analog and digital circuits.
DC/DC converter isolation of power from the main unit.
Isolation
No isolation between analog channels
The block occupies 8 I/O points
Number of occupied I/O points
(can be either inputs or outputs)

6. Allocation of buffer memories (BFM)

6.1 Buffer Memories
BFM CONTENTS
*#0 Characteristic change
Ch1 to CH4 Averaged temperature reading to
*#1 - #4
be averaged (1 to 256) Default = 8
Ch1 to CH4 Averaged temperature in 0.1°C units
#5 - #8
#9 - #12 Ch1 to CH4 Present temperature in 0.1°C units
Ch1 to CH4 Averaged temperature in 0.1°F units
#13 - #16
Ch1 to CH4 Present temperature in 0.1°F units
#17 - #20
#21 - #27 Reserved
*#28 Digital range error latch
Error status
#29
#30 Identification code K2040
#31 Reserved
1) BFM #0 value (K0 or K1) decides the Pt100 characteristic to be used.
K0 : JIS C 1604-1997
K1 : JIS C 1604-1981
2) The number of samples to be averaged are assigned in BFMs #1 to #4. Only the range
1 to 4096 is valid. Values outside this range are ignored. The default value of 8 is used.
3) A number of recently converted readings are averaged to give a smoother read out.
The averaged data is stored in BFMs #5 to #8 and #13 to #16.
4) BFMs #9 to #12 and #17 to #20 store the current value of the input data. This value is
in units of 0.1°C or 0.1°F, but the resolution is only 0.2°C to 0.3°C or 0.36°F to 0.54°F.
TX2N-4AD-PT User's Manual
Fahrenheit
-148°F to +1112°F
-1480 to +11120
0.36°F to 0.54°F
+11,120
Digital Digital
output output
-148°F
+600℃
-1,480 +1,112°F
℃ Temp.input °F
Specification
The TX2N-4AD-PT communicates
with the PLC via buffer memories.
BFMs (buffer memories) #21 to
#27 and #31 are reserved.
All BFM data can be read by the
PLC using the FROM instruction.
PLC can read/write the BFMs
(marked with "*" ), using FROM
/TO instructions.